Method for assembly of anti-static switch lock

Abstract

An anti-static switch lock wherein a terminal assembly having the desired configuration of rotor and contacts is secured to one end of a hub. The other end of the hub has an inboard lipped boss forming, in cooperation with the hub end, a circumscribed radial groove. A keylock assembly includes a barrel, one end of which has a chamber to receive the boss of the hub, and a key operated, rotatable plug. The hub, having the terminal assembly attached to one end, is positioned such that the groove is disposed within the chamber of the barrel. A number of stakes are formed in the barrel, the stakes engaging the groove to firmly secure the hub to the barrel. The plug is inserted into the barrel, the end of the plug interlocking with the shaft of the terminal assembly rotor to effectuate switching of contacts. To bias the plug, a spring mount which mounts a coil spring is interposed between the plug and the shaft of the rotor for the terminal assembly, one end of the spring engaging a catch on the hub to urge the rotation of the plug and shaft.

We claim: 
     
       1. A method for assembling a switch lock of the type having a terminal assembly attached to one end of a hub, a lock assembly including a key-operated plug rotatable to operate the terminal assembly for switching and a barrel to receive the plug, said barrel having an end adapted to receive a portion of the other end of said hub, said method comprising: inserting said portion of the other end of the hub into the barrel end to a limit defined by abutment of a radial stop surface on the hub with a distal end of said barrel end and abutment of a distal end of the hub portion with a radial stop surface on the barrel end;   staking said barrel end directly to said hub portion to interconnect said hub and barrel, said hub end defining a radially opening recess intermediate said hub end stop surface and hub end distal end, said step of staking comprising radially inwardly deforming said barrel end into said recess at a location spaced from said barrel end distal end to cause the deformed portion of the barrel end distal end to bear against the hub end at the edge of the recess most remote from said hub end stop surface and with the barrel end distal end abutting said hub end stop surface remaining substantially undeformed; and   positioning said key-operated plug in said barrel interconnected with the hub for operation of said terminal assembly.   
     
     
       2. The method of claim 1 wherein said staking includes deforming said barrel end to engage and secure said hub portion. 
     
     
       3. The method of claim 2 wherein said deforming includes depressing said barrel end radially inwardly to engage said hub portion to interlock said hub and said barrel. 
     
     
       4. The method of claim 3 wherein said depressing includes forming at least one radially inwardly directed dimple-like indentation. 
     
     
       5. The method of claim 1 wherein six equally spaced, dimple-like projections are punched radially inwardly to engage and secure to said barrel end with said hub portion in said staking step. 
     
     
       6. The method of claim 1 wherein said staking step includes stamping at least one dimple-like projection in said barrel end inward into said recess.